> Somehow I missed your email at first

No apologies, I sent the email before my membership to the mailing list was confirmed, that's why.

> Naalakkersuisut can decide DST rules as well as time zone rules for some areas

I noticed this somewhat vague phrasing as well and tried to dig into this.
The now superseded law https://lovgivning.gl/lov?rid={B25918C7-F814-408D-966A-F78B793963B4} is simlarly vague in this area, but the related act https://lovgivning.gl/Lov?rid={A08E0D7A-4FE3-4D79-9641-EB4C04BD4946} quite clearly specifies the rules about UTC offsets and DST (or lack hereof) for all four Greenlandic time zones.

> So for now I think it's better to back out the change to Ittoqqortoormiit that I guessed three days ago.

I agree that the combination of the two installed patches is the best guess we can make.

I've sent an email to Sermitsiaq.AG, the Greenlandic newspaper who wrote the articles, and asked if they can help clearing up what this means for Ittoqqortoormiit, e.g. if Ittoqqortoormiit will continue using DST despite Nuuk abolishing it.

/Jonas Nyrup

On Tue, 29 Nov 2022 at 03:38, Paul Eggert <eggert@cs.ucla.edu> wrote:

On 11/24/22 11:25, Jonas Nyrup via tz wrote:
> On last Saturday in October 2023 when DST ends America/Nuuk will switch
> from -03/-02 to -02/-01

Thanks for the heads-up. Somehow I missed your email at first, and in
response to Jürgen Appel's later email
<https://mm.icann.org/pipermail/tz/2022-November/032343.html>, three
days ago I installed a patch
<https://mm.icann.org/pipermail/tz/2022-November/032344.html> guessing
that the Nuuk and Ittoqqortoormiit areas will both switch to "permanent
DST" (i.e., change of standard time, and no DST) in March. However, my
guess about Ittoqqortoormiit seems to have jumped the gun, as the last
two paragraphs of the URL that you gave:

> https://sermitsiaq.ag/groenland-skifte-tidszone-trods-bekymringer

says that the intent is that Nuuk will not to back to winter time in
fall 2023, and that other Greenland regions are unaffected (though this
may change).

> I assume the official document will be published on
> https://naalakkersuisut.gl/kundgoerelser/2022?sc_lang=da

I found a copy of that document here:

https://naalakkersuisut.gl/-/media/naalakkersuisut/filer/kundgoerelser/2022/11/2511/31_da_inatsisartutlov-om-tidens-bestemmelse.pdf?la=da&hash=A33597D8A38CC7038465241119EF34F3

It says that standard time becomes -02 on March 25 (when DST would have
otherwise switched clocks to -02 anyway), and that Naalakkersuisut can
decide DST rules as well as time zone rules for some areas.

It sounds like they're still thinking about exactly what this all means,
that they don't like Nuuk's switching back and forth but haven't
codified this yet, and that they don't yet know what Ittoqqortoormiit
will prefer. So for now I think it's better to back out the change to
Ittoqqortoormiit that I guessed three days ago.

Proposed patch attached and installed into the development database.